. Fresh-water biology. Freshwater biology. A B Fig. 625. Mesostoma ehrenbergii. {A) Diagram from ventral side showing nervous, digestive, and reproductive systems. Left side shows summer eggs, the right, winter eggs: be, bursa copulatrix; da, anterior branch of intestine; rfoi, posterior branch of intestine; go, genital pore; k, ovary; i)e, cirrus; ph, pharynx; rs, receptaculum seminis; te, testes; m, uterus; vd, vas deferens; vi, yolk gland; w, vesicula seminalis; wge, female genital canal; co, subesophageal commissure of ventral nerves; din, dorsal longitudinal nerve; dii, dorsal nerve of br
. Fresh-water biology. Freshwater biology. A B Fig. 625. Mesostoma ehrenbergii. {A) Diagram from ventral side showing nervous, digestive, and reproductive systems. Left side shows summer eggs, the right, winter eggs: be, bursa copulatrix; da, anterior branch of intestine; rfoi, posterior branch of intestine; go, genital pore; k, ovary; i)e, cirrus; ph, pharynx; rs, receptaculum seminis; te, testes; m, uterus; vd, vas deferens; vi, yolk gland; w, vesicula seminalis; wge, female genital canal; co, subesophageal commissure of ventral nerves; din, dorsal longitudinal nerve; dii, dorsal nerve of brain; g, brain; Im, ventral longitudinal nerve; nr, pharyn- geal nerve ring; us, duct of uterus; ven, ventral nerve of brain; vid, duct of yolk gland; vn^ and vn% the two pairs of anterior nerves of brain; x, chiasma of anterior nerves. X 6. (After von Graff, Vogt, Fuhrmann, and Luther.) (5) From life, showing young worms in left uterus. Xg. (After Woodworth.) 74 (31) With a genuine proboscis which lies within a sheath and communi- cates with the exterior through an opening at the anterior end. Pharynx rosette-shaped. Subsection Calyptorhynchia . A small group easily recognized by the genuine proboscis. A bursa copulatrix is present. The cirrus is divided into vesicula seminalis and vesicula granulorum. The rosette-shaped pharynx hes on the ventral Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Ward, Henry Baldwin, 1865-1945; Whipple, George Chandler, 1866-1924. joint author. New York, John Wiley & sons, inc. ; [etc. ,etc. ]
Size: 952px × 2627px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectfreshwa, bookyear1918
